Visualize your Go data structures using graphviz

Overview

memviz Build Status Coverage Status Go Report Card GoDoc

How would you rather debug a data structure?

"Pretty" printed Visual graph
(*test.fib)(0xc04204a5a0)({
 index: (int) 5,
 prev: (*test.fib)(0xc04204a580)({
  index: (int) 4,
  prev: (*test.fib)(0xc04204a560)({
   index: (int) 3,
   prev: (*test.fib)(0xc04204a540)({
    index: (int) 2,
    prev: (*test.fib)(0xc04204a520)({
     index: (int) 1,
     prev: (*test.fib)(0xc04204a500)({
      index: (int) 0,
      prev: (*test.fib)(),
      prevprev: (*test.fib)()
     }),
     prevprev: (*test.fib)()
    }),
    prevprev: (*test.fib)(0xc04204a500)({
     index: (int) 0,
     prev: (*test.fib)(),
     prevprev: (*test.fib)()
    })
   }),
   .
   .
   .

Usage

memviz takes a pointer to an arbitrary data structure and generates output that can be used to generate an easy to understand diagram using graphviz.

To generate a diagram, first you will need to install graphviz on your system following the instructions here.

Next, use memviz.Map(out, &data) to generate a graphviz dot file and then pipe the output into graphviz.

For examples of how to use memviz, see the code sample in the example folder and the tests in memviz_test.go.

Comments
  • Update Readme : How to use this ?

    Update Readme : How to use this ?

    Expected Behaviour

    Update readme to reflect - How to use this app? where to install? which languages are supported? If i am not a go user, and still want it, how can that be made possible? A code snipped would do wonders.

    Actual Behaviour

    The code usage behavior. Actual installation or how to include it is not mentioned?

    opened by jatin69 4
  • Fix string escaping

    Fix string escaping

    If a string contains quote-characters, they don't get correctly escaped, causing syntax errors in the resulting graphviz file. This quotes the string using strconv and then removes the quote-characters added by that.

    opened by Merovius 4
  • Choose a less ambiguous name?

    Choose a less ambiguous name?

    It's been pointed out that memmap already has a conflicting meaning. Creating this ticket to guage reaction and vote on suggestions. Should the name be changed? Suggestions welcome.

    opened by bradleyjkemp 4
  • Bump github.com/stretchr/testify from 1.2.2 to 1.6.0

    Bump github.com/stretchr/testify from 1.2.2 to 1.6.0

    Bumps github.com/stretchr/testify from 1.2.2 to 1.6.0.

    Release notes

    Sourced from github.com/stretchr/testify's releases.

    v1.6.0

    Latest release of testify. This includes many fixes and enhancements. Please view the v1.6.0 milestone for a list of changes.

    HOTFIX: Revert suite interface type

    This is a hotfix which reverts the suite package's interface type to use testing.T

    v1.5.0

    Latest, non-breaking changes merged into master. Please peruse the git log for a detailed changelist

    v1.4.0

    The 1.4.0 release includes new matchers and bug fixes. See the v.1.4.0 milestone for a complete list of closed issues associated with this release.

    v1.3.0

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  • Bump github.com/stretchr/testify from 1.2.2 to 1.5.1

    Bump github.com/stretchr/testify from 1.2.2 to 1.5.1

    Bumps github.com/stretchr/testify from 1.2.2 to 1.5.1.

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    HOTFIX: Revert suite interface type

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    v1.5.0

    Latest, non-breaking changes merged into master. Please peruse the git log for a detailed changelist

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    The 1.4.0 release includes new matchers and bug fixes. See the v.1.4.0 milestone for a complete list of closed issues associated with this release.

    v1.3.0

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    Commits
    • 3ebf1dd Revert PR #867
    • 624f997 fix(suite): Add Fatalf method to suite.TestingT for gomock compatibility
    • 5d2970f Fix typo in CONTRIBUTING.md
    • 2aadfe8 Grammatical change in documentation for Run()
    • 55d8b57 Add interface tests for suite.T
    • 9dfcf7c suite: make suite.TestingT satisfy mock.TestingT
    • 518a149 IsType: A type-safe way of checking argument type
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  • Bump github.com/stretchr/testify from 1.2.2 to 1.5.0

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    v1.3.0

    Pull requests included in this release:

    Commits
    • 624f997 fix(suite): Add Fatalf method to suite.TestingT for gomock compatibility
    • 5d2970f Fix typo in CONTRIBUTING.md
    • 2aadfe8 Grammatical change in documentation for Run()
    • 55d8b57 Add interface tests for suite.T
    • 9dfcf7c suite: make suite.TestingT satisfy mock.TestingT
    • 518a149 IsType: A type-safe way of checking argument type
    • ea72eb9 added Log/Skip methods as required by CI tests
    • dca7be2 updated TestingSuite interface to use TestingT
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  • Bump github.com/stretchr/testify from 1.2.2 to 1.4.0

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    • 221dbe5 fix mutex
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    • 555ebd3 Fix panic for equality assertions for values of aliased string type
    • 0224ef2 Add YAMLEq to assert that two YAML strings are equivalent
    • d84e815 Introduce Eventually assertion.
    • ae5876d change report wording, fix int stringification, fix doc
    • 34c6fa2 assert, require: Regenerate
    • 21cb1c2 add ptr comparison func 'Same' to assert pkg
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  • Please tag new release -- post rename

    Please tag new release -- post rename

    I'm forgoing your issue template since it's format is orthogonal to the issue at hand.

    The latest tagged release (v0.2.2) is from 25 Jan 2018 -- back when the package was still named memmap. This is what gets downloaded by go get when using a modern (i.e. module-aware) version of Go.

    Therefore, if I import "github.com/bradleyjkemp/memviz" into a project that uses modules, I'm compelled to reference it as package memmap... and this acutely unballances my already precarious feng shui.

    Please tag a new release where the package name and the repo's basename agree.

    Thankyouverymuchandhaveaniceday.

    opened by tep 1
  • Full basic test coverage (#26)

    Full basic test coverage (#26)

    Hi,

    I have added an additional numerics structure that contains plain and pointers values. Also initialization code added to the test function. Test snapshots eyeballed and updated.

    Hope this works as requested.

    opened by dergluck 1
  • Braces not escaped in type strings

    Braces not escaped in type strings

    map[something]struct{} (and similar) fail to render because the { and } are not escaped in the output. strconv.Quote should be used on all type strings to prevent this.

    bug good first issue rendering 
    opened by bradleyjkemp 1
  • Bump github.com/stretchr/testify from 1.2.2 to 1.6.1

    Bump github.com/stretchr/testify from 1.2.2 to 1.6.1

    Bumps github.com/stretchr/testify from 1.2.2 to 1.6.1.

    Release notes

    Sourced from github.com/stretchr/testify's releases.

    Fixes breaking change with HTTPBodyContains

    A breaking change was accidentally released in v1.6.0 which breaks the API for the HTTPBodyContains and HTTPBodyNotContains, this release reverts that change.

    v1.6.0

    Latest release of testify. This includes many fixes and enhancements. Please view the v1.6.0 milestone for a list of changes.

    HOTFIX: Revert suite interface type

    This is a hotfix which reverts the suite package's interface type to use testing.T

    v1.5.0

    Latest, non-breaking changes merged into master. Please peruse the git log for a detailed changelist

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    • e2b269e This reverts commit 2adb7b54b75da2c74e9342ed115957fe0b07e0b4.
    • 6353e56 This reverts commit 9d083cac4a26c76f8d92dff41d459f3f2fc0b911.
    • 6561324 This reverts commit 484fff1ace1f0acb84676a548b53477685c16414.
    • 46420cf This reverts commit 1a43b8334acb9df58064b765cd16675cc7c2c8b3.
    • 303198d Revert "allow body for HTTPBodyContains and HTTPBodyNotContains for
    • e7cc868 Update TravisCI config
    • 004e3cb commit generated files
    • ac1463f Implement NotEqualValues
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  • Bump github.com/stretchr/testify from 1.6.1 to 1.7.0

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    Minor improvements and bug fixes

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    • acba37e Only use repeatability if no repeatability left
    • eb8c41e Add more tests to mock package
    • a5830c5 Extract method to evaluate closest match
    • 1962448 Use Repeatability as tie-breaker for closest match
    • 92707c0 Fixed the link to not point to assert only
    • 05dd0b2 Updated the readme to point to pkg.dev
    • c26b7f3 Update assertions.go
    • 8fb4b24 [Fix] The most recent changes to golang/protobuf breaks the spew Circular dat...
    • dc8af72 add generated code for positive/negative assertion
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  • Bump github.com/bradleyjkemp/cupaloy/v2 from 2.5.0 to 2.6.0

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  • Allow custom rendering methods

    Allow custom rendering methods

    Expected Behaviour

    Be able to get nice, simple visualisations as in https://github.com/Arafatk/DataViz

    Actual Behaviour

    Structures are visualised in full detail, regardless of level of detail needed in the output e.g. can't be used to create a simple diagram of a binary tree without showing all the fields/names/etc.

    enhancement rendering 
    opened by bradleyjkemp 0
  • improve big struct display

    improve big struct display

    I combined memviz with https://github.com/sitano/gsysint to display structure of runtime.g, and there are many fields in this struct.

    Expected Behaviour

    What were you wanting/expecting to happen? The layout of a struct can be displayed as multiple lines or a table or something.

    Actual Behaviour

    What actually happens at the moment? The struct is displayed as a single line, and too wide.

    Example input

    If possible, provide a small code sample which reproduces the issue (or, for a feature request, code that should work after the feature is implemented)

    package main
    
    import (
    	"os"
    	"sync/atomic"
    	"unsafe"
    
    	"github.com/bradleyjkemp/memviz"
    	"github.com/sitano/gsysint"
    )
    
    func main() {
    	var gp unsafe.Pointer
    
    	atomic.StorePointer(&gp, gsysint.GetG())
    
    	gg := (*gsysint.G)(gp)
    	memviz.Map(os.Stdout, gg)
    }
    
    

    Screenshot/Example output (if applicable)

    digraph {
    
    }
    
    enhancement rendering 
    opened by cch123 2
Owner
Bradley Kemp
Bradley Kemp
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